Adjustable lamp support



Nov. 29, 1949 w. A. LANDRUM 2,489,650

ADJUSTABLE LAMP SUPPORT 2 Sheets-Sheet 1 Filed Nov. 21, 1946 In ventorWiley Allen Landrum B, @Maa/Ew.

and may 1949 w. A. LANDRUM 2,489,650

ADJUSTABLE LAMP SUPPORT Filed Nov. 21, 1946 2 Sheets-Sheet 2 4 i. .JM

I ureutur B; @Mm

WWW 13m Patented Nov. 29, 1949 UNITED- STATES PATENT OFFICE ADJUSTABLELAMP SUPPORT Wiley Allen Landrum, Hattiesburg; Miss..ApplicationNovcmber 21, 19.46; Serial:,No. 71:1,27 7:

,2' Claimsr 1 This invention relates to new and useful imrprovements:and; structural refinements in. adjustable lamps, more specifically,adjustable desk lamps, floor lamps or thelike, and the principal objectof the invention is to provide a device oi the character hereindescribed, in which the source of light-and the. shadeassociatedtherewith may be easily and conveniently adjusted with respect to thelampbase.

A further object of the-invention is to provide an adjustable lampiwhichis simple inconstrum tion, pleasing in..appearance,and, which may be.readily di'sassembledfor purposes. ofinspection or repair..

Another object. ofthei'nvent'ion. is .to provide an adjustablev lampwhich,will not easily become d'amagediandlwhich willreadily lendjitselfto economi'cal manufacture.

An additionalobjectoi. theinventionis to provide an. adjustablelampwhich. is otherwise. well adaptedrforthepurpose for which it-isintendedi With the abovemore important objects in, View and such otherobjects as may become apparent, asthis specification proceeds,, theinvention con-. sists essentially ofthe construction. and arrangement ofparts as shown in the accompanying drawings in which:

Figure 1 isx a perspective view) of the invention.

Figurez is a. cross-sectional view,-taken substantially in the plane ofthe line .2-2 of Figure 1.

Figure 34 is a cross-sectional view, taken substantially in the plane.of theline. 3-3 in Figure 1.

Figure 4 is an exploded; perspective. view showing a. cradle and aknuckleusedl in theinvention.

Figure 51s aneundersid'eperspective view of a shade used therein, and

Figure 6 isla side fllei/fifiOIhOf: a.:modif1ed embodiment of theinvention.

Like character's of reference areusedto designate like parts in thespecification and throughout the several views.

Referring now to the accompanying drawings in detail,- the inventionconsists of an adjustable lamp designated generally-bythe referencecharacter Hi, the same embodying in its construction a substantiallycircular base H consisting of an inner member l2-positioned underaninverted dish-like cover l3.

Thelatter is secured to-the member P2 inany suitable manner and it willbe noted that'the member is formed in the undersid thereof with anelongated recess or chamber 14, the purpose of which will be hereinaftermore fully explained.

2 The base member l2; may also be provided on the underside thereof witha. plurality of rubber pads: I5 for obviousireasons.

The cover H is provided with an opening l6 communicating with thechamber M of the base member l2 and the opening I6 is surrounded by, anupwardly extending, cradle [1. This cradle is best shown in. theaccompanyin Figure 4, wherein it will be noted that itconsists of apair. of spacedparallel, ears l8.connected together by the side.members, l9. Each of the ears I8 is formed with acentralapertureHandwith a pair oidiametrically. opposedfirecesses 2!, one of these recessessimply assuming the form of a notch provided inthevmarginal edge of'theear.

The recesses 2t arev 'arcuate and concentric with respect totheapertures 20;

A knuckle.v assuming the form of a tubular member 22 is rotatablypositioned in the cradle I] between the ears l'8, the bore of the member22 beingprovided' atjthe ends thereof with chame f eredportions 23,,

The knuckle 22' is also provided with a, later-f ally projectingextension 24 which is hollow and communicates with the bore of theknuckle. It will be noted" that the extension 24 projects through theopening [6 into thechamber M of the base.

Arv pair of bearingbl'ocks 25 areassociated with the knuckle 22, eachconsisting of a tubular shank 26 provided, at one, end thereof with aflange '21. This flange is, in turn, equipped with a pair ofdiametrically opposed, beveled lugs 28; these being of an arcuateconfiguration and being concentric'with respect to the shank 26.

The shanks 26 are receivable in the apertures Zlliof'the cradle; lrand'the lugs '28 extend through the recesses 21; so thatthe beveled edgesthereof rotatably engage the chamfered portions 23 of the knuckle 22.

An assembly screw 29, provided with a nut 30, extends through. the.blocks 25, through the cars- 18 and through-,thebore of the, knuckle22., whereby the variouscomponentsare secured together. It will. be:noted that the blocks 25, are equipped with suitable counter-bores. toreceive the head of the bolt 29 and the nut 30.

The: knuckle 22: carries; an upright, tubular standard 31;, the upperendof the latter forming a fork 32 which straddles a suitable extremity 33of a carrier 34. A pin 35 is employed. for pivotally connecting the fork32 to the extremity 33 of the carrier.

The carrier 34 is configurated substantially as shown and is providedwith a conventional socket 35 to receive an incandescent lamp 31.

The carrier 34 is also provided with a pair of supporting pads 38 and39, the former being slidably receivable in an offset strap 40 securedto a reinforcing plate 4| which, in turn, is provided on the innersurface of a suitable lamp shade 42.

The supporting pad 39 is equipped with a bolt 43 which extends through asuitable aperture 44 provided in the shade structure and carries aknurled nut 45. It will be apparent that in this manner, the shade 42 isremovably attached to the carrier 34.

The base H is provided with a clevis pin 45, to which is pivotallyconnected as at 41 one end of a control bar 48. The remaining end ofthis bar is pivoted as at 49 to an adjusting screw 50, the shank of thelatter operatively engaging a screw-threaded bore provided in anadjusting nut I. This nut isv freely rotatable in a suitable apertureprovided in the carrier 34.

It should be added that if desired, the aforementioned standard 3l maybe equipped with a hand grip 52 which extends partially along the lengthof the standard and is secured thereto by a set screw 53-.

The current conductors 54 are taken from the lamp socket 35 through theextension 33 of the carrier 34 and thence downwardly through thestandard 3|. Thereupon, the conductors 54 pass through the knuckle 22and through the extension 24 associatedtherewith into the chamber 14 inthe base H and are connected to an extension cord 55 terminating in aconventional attachment plug 56. The cord 55 passes outwardly from thechamber 14 through a grommet 51 provided in the marginal flange of thecover I3 and it will be also noted that the cover carries a push buttonswitch 58 which is wired in series with the lamp 3?.

The underside of the chamber [4 is closed by a removable cover plate 59which is secured to the base member l2 by means of a plurality of screws60.

When the invention is placed in use, it will be found that the positionof the lamp 37 and the associated shade 42 may be readily adjusted with.respect to the base H by virtue of the pivoted standard 3! andthepivoted control bar 48. The control bar extends in a spaced parallelrelation to the standard and, accordingly, the'shade 42 will remain atall times substantially parallel to the base ll, regardless of thepositional adjustment of the lamp. This is exemplified by the phantomlines 6| in the accompanying Figure 1.

In addition, the carrier 34 and the shade 42 may be adjusted withrespect to the standard 3i, this being accomplished by simply rotatingthe nut 5i and thereby tilting. the carrier 34 about the pin 35.

Referring now to the modified embodiment of the invention illustrated inthe accompanying Figure 6, the adjustable lamp designated generally bythe reference character is similar to the aforementioned lamp 10, but isprimarily intended for use as a fioor lamp rather than as a desk lamp,as in the embodiment already described. The lamp 10 includes thestandard H provided with a hand grip l2 and a control bar 73, the samesupporting a carrier (not shown) for the lamp and shade l4.

The lower end portion of the standard II is pivoted to a cradle assumingthe form of a sleeve 15, the latter also being provided with a clevis 16to which the lower end of the bar 13 is pivotally attached.

The sleeve 15 is mounted at the upper end of an upright shaft 11, thelower end of which is, in turn, secured to a suitable base 18.

When this embodiment of the invention is placed in use, the lamp may beconveniently adjusted as exemplified by the phantom lines 18, in themanner already described in connection with the lamp 10. If desired, theprovision of a switch in the base 18 may be dispensed with and asuitable switch may be associated directly with the lamp socket.

It is believed that the advantages and use of the invention will beclearly understood from the foregoing disclosure and, accordingly,further description thereof at this point is considered unnecessary.

While in the foregoing there has been shown and described the preferredembodiment of this invention it is to be understood that minor changesin the details of construction, combination and arrangement of parts maybe resorted to without departing from the spirit and scope of theinvention as claimed.

What I claim as my invention is:

1. In an adjustable lamp, a base, a standard pivoted at one end thereofto said base, a lamp carrier pivoted to the remaining end of saidstandard, said carrier being formed with an aperture, an internallyscrew-threaded nut freely rotatable L in said aperture, a screwadjustable in said nut,

and a control bar pivoted at one end thereof to said base, the remainingend of said bar being pivoted to said screw.

2. In an adjustable lamp, a base formed with an opening, a cradleprovided on said base at the edges of said opening, said cradleincluding a pair of spaced ears each formed with a central aperture andwith diametrically opposed recesses, a substantially tubular knucklemember rotatably positioned between said ears and formed at its endswith chamfered bore portions, a pair of bearing blocks each including atubular shank, a flange at one end of said shank and a pair ofdiametrically opposed and bevelled lugs on said flange, said shanksbeing receivable in said apertures, said lugs extending through saidrecesses and irictionally engaging the chamfered bore portions of saidknuckle member, an assembly bolt extending through said member andbearing blocks, a standard connected to said knuckle member, and a lampcarrier on said standard.

WILEY ALLEN LANDRUM.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Koch Dec. 12, 1944

